Drill.



UNITED STATES Patented May 24, 1904.

PATENT OFFICE.

ONE-HALF TO VAL CRYDER, OF GRAND RAPIDS, MICHIGAN.

DRILL.

SPECIFICATION forming part of Letters Patent No. 760,525, dated May 24,1904.

' Application filed June 3, 1903. Serial No. 159,897. (No model.)

To all "wit/mt it may concern:

Be it known that I, CLARENCE W. Guess- MAN, a citizen of the UnitedStates, residing at Grand Rapids, in the county of Kent and State ofMichigan, have invented certain new and useful Improvements in Drills;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to improvements in manually-operated drills; andits object is to provide a device that is portable, that can be readilyattached to any object that is to be drilled, to provide the same withautomatic feed mechanism, to provide a device that may be manuallyoperated by attaching thereto either an ordinary carpenters brace or acrank, and to provide the device with certain new and useful featureshereinafter more fully described, and particularly pointed out in theclaims.

My device consists, essentially, of the combination and arrangement ofparts hereinafter described, reference being had to the accompanyingdrawings, in-which Figure 1 represents my device complete and attachedto a pipe; Fig. 2, a vertical section of a part of the same on the line2 2 of Fig. 3, and Fig. 3 a plan view of the same.

Like letters refer to like parts in all of the figures.

r A is the drill-spindle, provided with asuitable socket B at one end toreceive the drill and squared at the other end, as at C, to receive abrace or crank to rotate the spindle.

I) is a sleeve in which this spindle is rotative. This sleeve isexternally threaded and is inserted in a screw-threaded opening in themiddle of the yoke J. To one end of this yoke is attached a chain P, andthe other end of the yoke is provided with a suitable hook to engage therespective links of the said chain, whereby the yoke may be attached toany object to be drilled by passing the chain around the same andengaging it with said book.

To provide a thrust-bearing for the spindle, a cup E is attached to thelower end of the sleeve and a cone F is provided on the spindle, betweenwhich cup and cone are inserted suitable balls. The cup E also forms asuitable head that may be used to manually rotate the sleeve. Toautomatically rotate the sleeve and force the drill forward, a gear N isfixed on the upper end of the sleeve, with which gear a gear 0 engages.This latter gear is actuated by means of a ratchet M, which ratchet inturn is operated by a tooth L, rotative with the spindle (J. This toothL consists, preferably, of a set screw projecting from a collar K,longitudinally adjustableon the spindle to take up the wear of thethrustbearing. The end of said screw is flattened, as shown, wherebythis serves as a tooth to engage the ratchet and also to turn the screwand set the collar K. The ratchet M and gear 0 are mounted on a rotativcshaft 1, and to support this shaft in place I provide a bar Gr, arrangedparallel with the yoke J and mov able toward and from the same andhaving a central opening through which the spindle 0 extends. This baris held from rotating with thespindle by means of a pin H, attached toone end of the bar and extending rigidly at right angles therefrom andlongitudinally movable in an opening in the yoke J near one end thereof.The shaft I is journaled in the bar G and yoke J and is alsolongitudinally movable in the yoke.

The operation of the device is as follows: WVhen attached, as shown inFig. 1, the sleeve D may be manually rotated to tighten the chain P andstart the drill, and thereafter as the spindle (l is rotated the tooth Lwill at each revolution engage and move the ratchet M, whereby thesleeve will be regularly turned. to force the drill forward a slightdistance at each revolution.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is

1. The combination of a yoke having a screw-threaded opening, means forattaching the yoke to an article to be drilled, a screwthreaded sleeverotative in the opening of the yoke, a spindle rotative in the sleeve, ashaft rotative in the yoke, intermeshing gears fixed on the shaft andsleeve, and means for transmitting motion from the spindle to the shaft.

2. A yoke having a screw-threaded opening, means for attaching the yoketo an article to be drilled, a screw-threaded sleeve rotative in theopening of the yoke, a spindle rotative in the sleeve, a bar movablewith the sleeve, a rod rigidly attached to the bar and longitudinallymovable in the yoke, a gear fixed on the sleeve, a gear supported on thebar and engaging the gear on the sleeve, a ratchet connected to thelast-named gear, and a tooth on the spindle to engage and turn theratchet.

3. The combination of a yoke having a screw-threaded opening, ascrew-threaded sleeve rotative in the said opening, means for attachingthe yoke to an article to be drilled, a bar movable toward and from theyoke, a

shaft attached to the bar and slidable in an opening in the yoke,intermeshing gears fixed on the shaft and sleeve, a ratchet on theshaft,

a spindle rotative in the sleeve, and a tooth on the spindle to engageand turn the ratchet.

4. The combination of a yoke having a screw-threaded opening, means forattaching the yoke to an article to be drilled, a screwthreaded sleeve,a rod, and a shaft, each longitudinally movable in the yoke, a barmovable toward and from the yoke and supporting the rod and shaft, aspindle rotative in the sleeve and bar, a thrust-bearing between thesleeve and spindle, intermeshing gears on the sleeve and shaft, aratchet on the shaft, an adjustable collar on the spindle, and aset-screw in the collar and forming a tooth to engage the ratchet;

In testimony whereof I affiX my signature in presence of two witnesses.

CLARENCE W. CROSSMAN.

Witnesses:

LUTHER V. MoULToN, GEoRGIANA CHAoE.

